3, 3’ Diaminodipropane is investigated as corrosion inhibitor for Carbon steel in different concentrations of Hydrochloric Acid medium and at temperatures 25, 30, 350C. Corrosion rate and Percentage Corrosion Inhibition Efficiency (PCIE) was calculated by weight loss method, Electrochemical polarization experiments and Impedance spectroscopy techniques. Surface study of corroded and blank specimens was carried out by SEM and Metallurgical research Microscopy techniques. Different concentrations of (100, 200, 400, 600, 800 and 1000 ppm) 3, 3’diaminodipropylamine was tested in different concentration of HCl solution i.e. 2.0, 1.0 and 0.1 N. Observed results show that percentage corrosion inhibition efficiency increases with increase in concentration of corrosion inhibitor. Effect of temperature on percentage corrosion inhibition efficiency was also studied. As the temperature increases percentage corrosion inhibition efficiency decreases. It is also observed that percentage corrosion inhibition efficiency decreases with dilution of HCl. DADPA acts as a very good inhibitor for Carbon Steel in different hydrochloric acid medium.